[sage-support] Re: problems with modular symbols over finite fields

2007-11-20 Thread mabshoff
On Nov 21, 4:56 am, Alex Ghitza <[EMAIL PROTECTED]> wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 Hi Alex, > > Hi, > > I've been playing with spaces of modular symbols over finite fields, and > I ran into two issues that seem to be separate (they're tickets #1231 > and #1232 now): >

[sage-support] problems with modular symbols over finite fields

2007-11-20 Thread Alex Ghitza
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, I've been playing with spaces of modular symbols over finite fields, and I ran into two issues that seem to be separate (they're tickets #1231 and #1232 now): 1. doing ModularSymbols(1,8,0,GF(3)).simple_factors() gives - -

[sage-support] Re: [sage-newbie] curve length

2007-11-20 Thread Mike Hansen
Hmm... I just tested it on a newer version, and I get the incorrect answer. I'll look into it more. --Mike On Nov 20, 2007 7:03 PM, Mike Hansen <[EMAIL PROTECTED]> wrote: > This is ticket #987 which was fixed in 2.8.9. > > --Mike > > > On Nov 20, 2007 5:37 AM, David Joyner <[EMAIL PROTECTED]>

[sage-support] Re: [sage-newbie] curve length

2007-11-20 Thread Mike Hansen
This is ticket #987 which was fixed in 2.8.9. --Mike On Nov 20, 2007 5:37 AM, David Joyner <[EMAIL PROTECTED]> wrote: > > On Nov 20, 2007 8:12 AM, [EMAIL PROTECTED] > <[EMAIL PROTECTED]> wrote: > > > > As far as i know, length of curve, defined as > > f(x) > > from a to b (a <= x <= b) is > > L

[sage-support] Re: Questions about solve()

2007-11-20 Thread David Joyner
No, but sage: t = var("t") sage: a = lambda t: 0.004*(8*exp(-300*t) - 8*exp(-1200*t))*72*exp(-300*t) - 0.1 sage: attach '/home/wdj/sagestuff/sage-2.8.9.rc1/examples/calculus/newton_raphson.sage' sage: newton_raphson(a,0.01,0.01,0.1) 0.0205789829857519 works okay. (This newton_raphso

[sage-support] Questions about solve()

2007-11-20 Thread Ted Kosan
Does anyone have any thoughts on why the solve() function this program returns an empty list?: sage: var('t') sage: a = .004*(8*e^(-(300*t)) - 8*e^(-(1200*t)))*(72*e^(-(300*t)) - 1152*e^(-(1200*t))) +.004*(9600*e^(-(1200*t)) - 2400*e^(-(300*t)))^2 sage: print a(t=.000411) sage: show(plot(

[sage-support] Re: bug in eigenspaces?

2007-11-20 Thread David Joyner
Done http://sagetrac.org/sage_trac/ticket/1219 On Nov 20, 2007 2:22 PM, William Stein <[EMAIL PROTECTED]> wrote: > > > On Nov 20, 2007 11:14 AM, David Joyner <[EMAIL PROTECTED]> wrote: > > > > Hi: > > > > Something funny is going on: > > > > sage: MS = MatrixSpace(CC, 2, 2) > > sage: A = MS([[1,5

[sage-support] Re: bug in eigenspaces?

2007-11-20 Thread William Stein
On Nov 20, 2007 11:14 AM, David Joyner <[EMAIL PROTECTED]> wrote: > > Hi: > > Something funny is going on: > > sage: MS = MatrixSpace(CC, 2, 2) > sage: A = MS([[1,5],[3,-1]]) > sage: A.eigenspaces() > > [ > (4.00, [ > (1.00, 1.00) > ]), > (-4.00, [ >

[sage-support] bug in eigenspaces?

2007-11-20 Thread David Joyner
Hi: Something funny is going on: sage: MS = MatrixSpace(CC, 2, 2) sage: A = MS([[1,5],[3,-1]]) sage: A.eigenspaces() [ (4.00, [ (1.00, 1.00) ]), (-4.00, [ ]) ] sage: A.eigenspaces()[0] (4.00, [ (1.00, 1.00) ])

[sage-support] Re: [sage-newbie] curve length

2007-11-20 Thread David Joyner
On Nov 20, 2007 8:12 AM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > As far as i know, length of curve, defined as > f(x) > from a to b (a <= x <= b) is > L = integral from a to b of sqrt(1 + df(x)^2)dx > where df(x) is diff(f,x) > > for f(x) = y = x^2 , a=0, b=2 it should be > df(x)=2x > sqr

[sage-support] Re: missing library?

2007-11-20 Thread [EMAIL PROTECTED]
Thanks - for some reason I thought the good one was a Debian specific release and the other one was a general release. Guess I got it the wrong way round... Cheers, Chris --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To u